Heyde - Antique and Vintage Cameras

Heyde Aktino-Photometer

1904

Early Model

G. Heyde

Dresden

Germany

Image of Heyde Aktino-Photometer

Meter Type:
Extinction.

Calibration:
Shutter speed: 1/64 - 1500s. Apertures: f8 - f45.

Late Model

Meter Type:
Extinction.

Calibration:
Shutter speed: 1/64 - 1500s. Apertures: f8 - f45.

The subject is viewed through the small central eye-piece, turning the case causes a variable density wedge to slide over the field of view. When the indistinct point is reached a value is read from a window on the front of the meter, this is used to look up the shutter speed and aperture pairs from a table printed on the front of the meter. In bright conditions a filter can be swung into the field of view. The early Aktino-Photometer was well-made but its mechanism and construction was over complicated for an extinction meter. The price in 1905 was 17/6.

References & Notes:
BJA 1906, pp. 290, 939. BJA 1912, p. 15.

Heyde Aktino Meter

G. Heyde

Dresden

Germany

Meter Type:
Extinction.

Calibration:
Shutter speed: 1/300 - 80s. Aperture: f4.5 - f36.

With:
Aluminium container.

Rotating the case of the meter turns a blue variable density wedge. At the extinction point a series of shutter speed and aperture pairs can be read.

References & Notes:
BJA 1924, p. 742. BJA 1925, p. 716. BJA 1929, p. 645.

Heyde Aktino Meter

G. Heyde

Dresden

Germany

Image of Heyde Aktino Meter

Meter Type:
Extinction.

Calibration:
Shutter speed: 1/300 - 80s. Aperture: f4.5 - f36.

With:
Letter from Staley dated 1914 regarding the meter.

Extinction

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Le Photometre Normal

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